static unsigned int
execute_mudflap_function_decls (void)
{
struct gimplify_ctx gctx;
/* Don't instrument functions such as the synthetic constructor
built during mudflap_finish_file. */
if (mf_marked_p (current_function_decl)
|| mf_artificial (current_function_decl))
return 0;
push_gimplify_context (&gctx);
mf_xform_decls (gimple_body (current_function_decl),
DECL_ARGUMENTS (current_function_decl));
pop_gimplify_context (NULL);
return 0;
}
static unsigned int
execute_mudflap_function_decls (void)
{
struct gimplify_ctx gctx;
DEBUGLOG("Zahed: entering LBC pass1\n");
/* Don't instrument functions such as the synthetic constructor
built during mudflap_finish_file. */
if (mf_marked_p (current_function_decl) ||
DECL_ARTIFICIAL (current_function_decl))
return 0;
push_gimplify_context (&gctx);
mf_xform_decls (gimple_body (current_function_decl),
DECL_ARGUMENTS (current_function_decl));
pop_gimplify_context (NULL);
return 0;
}
static void
test_gimplification ()
{
tree fndecl = build_trivial_generic_function ();
/* Convert to gimple: */
gimplify_function_tree (fndecl);
/* Verify that we got gimple out of it. */
/* The function is now in GIMPLE form but the CFG has not been
built yet. */
/* We should have a struct function for the decl. */
function *fun = DECL_STRUCT_FUNCTION (fndecl);
ASSERT_TRUE (fun != NULL);
ASSERT_EQ (fndecl, fun->decl);
/* We expect a GIMPLE_BIND, with two gimple statements within it:
tmp = 42;
return tmp; */
gimple_seq seq_fn_body = gimple_body (fndecl);
ASSERT_TRUE (seq_fn_body != NULL);
gimple *bind_stmt = gimple_seq_first_stmt (seq_fn_body);
ASSERT_EQ (GIMPLE_BIND, gimple_code (bind_stmt));
ASSERT_EQ (NULL, bind_stmt->next);
gimple_seq seq_bind_body = gimple_bind_body (as_a <gbind *> (bind_stmt));
/* Verify that we have the 2 statements we expect. */
ASSERT_TRUE (seq_bind_body != NULL);
gimple *stmt1 = gimple_seq_first_stmt (seq_bind_body);
ASSERT_TRUE (stmt1 != NULL);
ASSERT_EQ (GIMPLE_ASSIGN, gimple_code (stmt1));
gimple *stmt2 = stmt1->next;
ASSERT_TRUE (stmt2 != NULL);
ASSERT_EQ (stmt1, stmt2->prev);
ASSERT_EQ (GIMPLE_RETURN, gimple_code (stmt2));
}
/* Return true when FNDECL has Gimple body either in unlowered
or CFG form. */
bool
gimple_has_body_p (tree fndecl)
{
struct function *fn = DECL_STRUCT_FUNCTION (fndecl);
return (gimple_body (fndecl) || (fn && fn->cfg));
}
static unsigned int
lower_function_body (void)
{
struct lower_data data;
gimple_seq body = gimple_body (current_function_decl);
gimple_seq lowered_body;
gimple_stmt_iterator i;
gimple bind;
tree t;
gimple x;
/* The gimplifier should've left a body of exactly one statement,
namely a GIMPLE_BIND. */
gcc_assert (gimple_seq_first (body) == gimple_seq_last (body)
&& gimple_code (gimple_seq_first_stmt (body)) == GIMPLE_BIND);
memset (&data, 0, sizeof (data));
data.block = DECL_INITIAL (current_function_decl);
BLOCK_SUBBLOCKS (data.block) = NULL_TREE;
BLOCK_CHAIN (data.block) = NULL_TREE;
TREE_ASM_WRITTEN (data.block) = 1;
data.return_statements.create (8);
bind = gimple_seq_first_stmt (body);
lowered_body = NULL;
gimple_seq_add_stmt (&lowered_body, bind);
i = gsi_start (lowered_body);
lower_gimple_bind (&i, &data);
i = gsi_last (lowered_body);
/* If the function falls off the end, we need a null return statement.
If we've already got one in the return_statements vector, we don't
need to do anything special. Otherwise build one by hand. */
if (gimple_seq_may_fallthru (lowered_body)
&& (data.return_statements.is_empty ()
|| gimple_return_retval (data.return_statements.last().stmt) != NULL))
{
x = gimple_build_return (NULL);
gimple_set_location (x, cfun->function_end_locus);
gimple_set_block (x, DECL_INITIAL (current_function_decl));
gsi_insert_after (&i, x, GSI_CONTINUE_LINKING);
}
/* If we lowered any return statements, emit the representative
at the end of the function. */
while (!data.return_statements.is_empty ())
{
return_statements_t t = data.return_statements.pop ();
x = gimple_build_label (t.label);
gsi_insert_after (&i, x, GSI_CONTINUE_LINKING);
gsi_insert_after (&i, t.stmt, GSI_CONTINUE_LINKING);
}
/* If the function calls __builtin_setjmp, we need to emit the computed
goto that will serve as the unique dispatcher for all the receivers. */
if (data.calls_builtin_setjmp)
{
tree disp_label, disp_var, arg;
/* Build 'DISP_LABEL:' and insert. */
disp_label = create_artificial_label (cfun->function_end_locus);
/* This mark will create forward edges from every call site. */
DECL_NONLOCAL (disp_label) = 1;
cfun->has_nonlocal_label = 1;
x = gimple_build_label (disp_label);
gsi_insert_after (&i, x, GSI_CONTINUE_LINKING);
/* Build 'DISP_VAR = __builtin_setjmp_dispatcher (DISP_LABEL);'
and insert. */
disp_var = create_tmp_var (ptr_type_node, "setjmpvar");
arg = build_addr (disp_label, current_function_decl);
t = builtin_decl_implicit (BUILT_IN_SETJMP_DISPATCHER);
x = gimple_build_call (t, 1, arg);
gimple_call_set_lhs (x, disp_var);
/* Build 'goto DISP_VAR;' and insert. */
gsi_insert_after (&i, x, GSI_CONTINUE_LINKING);
x = gimple_build_goto (disp_var);
gsi_insert_after (&i, x, GSI_CONTINUE_LINKING);
}
/* Once the old body has been lowered, replace it with the new
lowered sequence. */
gimple_set_body (current_function_decl, lowered_body);
gcc_assert (data.block == DECL_INITIAL (current_function_decl));
BLOCK_SUBBLOCKS (data.block)
= blocks_nreverse (BLOCK_SUBBLOCKS (data.block));
clear_block_marks (data.block);
data.return_statements.release ();
return 0;
}
static unsigned int
lower_function_body (void)
{
struct lower_data data;
gimple_seq body = gimple_body (current_function_decl);
gimple_seq lowered_body;
gimple_stmt_iterator i;
gimple bind;
gimple x;
/* The gimplifier should've left a body of exactly one statement,
namely a GIMPLE_BIND. */
gcc_assert (gimple_seq_first (body) == gimple_seq_last (body)
&& gimple_code (gimple_seq_first_stmt (body)) == GIMPLE_BIND);
memset (&data, 0, sizeof (data));
data.block = DECL_INITIAL (current_function_decl);
BLOCK_SUBBLOCKS (data.block) = NULL_TREE;
BLOCK_CHAIN (data.block) = NULL_TREE;
TREE_ASM_WRITTEN (data.block) = 1;
data.return_statements.create (8);
bind = gimple_seq_first_stmt (body);
lowered_body = NULL;
gimple_seq_add_stmt (&lowered_body, bind);
i = gsi_start (lowered_body);
lower_gimple_bind (&i, &data);
i = gsi_last (lowered_body);
/* If the function falls off the end, we need a null return statement.
If we've already got one in the return_statements vector, we don't
need to do anything special. Otherwise build one by hand. */
if (gimple_seq_may_fallthru (lowered_body)
&& (data.return_statements.is_empty ()
|| (gimple_return_retval (data.return_statements.last().stmt)
!= NULL)))
{
x = gimple_build_return (NULL);
gimple_set_location (x, cfun->function_end_locus);
gimple_set_block (x, DECL_INITIAL (current_function_decl));
gsi_insert_after (&i, x, GSI_CONTINUE_LINKING);
}
/* If we lowered any return statements, emit the representative
at the end of the function. */
while (!data.return_statements.is_empty ())
{
return_statements_t t = data.return_statements.pop ();
x = gimple_build_label (t.label);
gsi_insert_after (&i, x, GSI_CONTINUE_LINKING);
gsi_insert_after (&i, t.stmt, GSI_CONTINUE_LINKING);
}
/* Once the old body has been lowered, replace it with the new
lowered sequence. */
gimple_set_body (current_function_decl, lowered_body);
gcc_assert (data.block == DECL_INITIAL (current_function_decl));
BLOCK_SUBBLOCKS (data.block)
= blocks_nreverse (BLOCK_SUBBLOCKS (data.block));
clear_block_marks (data.block);
data.return_statements.release ();
return 0;
}
static unsigned int
execute_trace ()
{
gimple_seq body, body_bind_body, inner_cleanup, outer_cleanup;
gimple inner_try, outer_try;
tree record_type, func_start_decl, func_end_decl, var_decl,
function_name_decl, constructor_clobber;
gimple call_func_start;
gimple_stmt_iterator gsi;
// build record type
record_type = build_type ();
// build start & end function decl
func_start_decl = build_function_decl ("__start_ctrace__", record_type);
func_end_decl = build_function_decl ("__end_ctrace__", record_type);
// init variables of current body
body = gimple_body (current_function_decl);
var_decl = build_decl (UNKNOWN_LOCATION, VAR_DECL,
get_identifier ("__ctrace_var__"), record_type);
DECL_CONTEXT (var_decl) = current_function_decl;
TREE_ADDRESSABLE (var_decl) = 1;
declare_vars (var_decl, body, false);
TREE_USED (var_decl) = 1;
// mimic __FUNCTION__ builtin.
function_name_decl = make_fname_decl ();
declare_vars (function_name_decl, body, false);
// construct inner try
// init calls
call_func_start = gimple_build_call (
func_start_decl, 2,
build1 (ADDR_EXPR, build_pointer_type (record_type), var_decl),
build1 (ADDR_EXPR, build_pointer_type (TREE_TYPE (function_name_decl)),
function_name_decl));
// make inner clean up
inner_cleanup = gimple_build_call (
func_end_decl, 2,
build1 (ADDR_EXPR, build_pointer_type (record_type), var_decl),
build1 (ADDR_EXPR, build_pointer_type (TREE_TYPE (function_name_decl)),
function_name_decl));
// update inner try
body_bind_body = gimple_bind_body (body);
inner_try
= gimple_build_try (body_bind_body, inner_cleanup, GIMPLE_TRY_FINALLY);
gsi = gsi_start (inner_try);
gsi_insert_before (&gsi, call_func_start, GSI_NEW_STMT);
// construct outer try
constructor_clobber = make_node (CONSTRUCTOR);
TREE_THIS_VOLATILE (constructor_clobber) = 1;
TREE_TYPE (constructor_clobber) = TREE_TYPE (var_decl);
outer_cleanup = gimple_build_assign (var_decl, constructor_clobber);
// update outer try
outer_try
= gimple_build_try (call_func_start, outer_cleanup, GIMPLE_TRY_FINALLY);
// update body bind body
gimple_bind_set_body (body, outer_try);
if (dump_file)
{
dump_function_to_file (current_function_decl, dump_file,
TDF_TREE | TDF_BLOCKS | TDF_VERBOSE);
}
// exit (0);
return 0;
}
static unsigned int
lower_function_body (void)
{
struct lower_data data;
gimple_seq body = gimple_body (current_function_decl);
gimple_seq lowered_body;
gimple_stmt_iterator i;
gimple *bind;
gimple *x;
/* The gimplifier should've left a body of exactly one statement,
namely a GIMPLE_BIND. */
gcc_assert (gimple_seq_first (body) == gimple_seq_last (body)
&& gimple_code (gimple_seq_first_stmt (body)) == GIMPLE_BIND);
memset (&data, 0, sizeof (data));
data.block = DECL_INITIAL (current_function_decl);
BLOCK_SUBBLOCKS (data.block) = NULL_TREE;
BLOCK_CHAIN (data.block) = NULL_TREE;
TREE_ASM_WRITTEN (data.block) = 1;
data.return_statements.create (8);
bind = gimple_seq_first_stmt (body);
lowered_body = NULL;
gimple_seq_add_stmt (&lowered_body, bind);
i = gsi_start (lowered_body);
lower_gimple_bind (&i, &data);
i = gsi_last (lowered_body);
/* If we had begin stmt markers from e.g. PCH, but this compilation
doesn't want them, lower_stmt will have cleaned them up; we can
now clear the flag that indicates we had them. */
if (!MAY_HAVE_DEBUG_MARKER_STMTS && cfun->debug_nonbind_markers)
{
/* This counter needs not be exact, but before lowering it will
most certainly be. */
gcc_assert (cfun->debug_marker_count == 0);
cfun->debug_nonbind_markers = false;
}
/* If the function falls off the end, we need a null return statement.
If we've already got one in the return_statements vector, we don't
need to do anything special. Otherwise build one by hand. */
bool may_fallthru = gimple_seq_may_fallthru (lowered_body);
if (may_fallthru
&& (data.return_statements.is_empty ()
|| (gimple_return_retval (data.return_statements.last().stmt)
!= NULL)))
{
x = gimple_build_return (NULL);
gimple_set_location (x, cfun->function_end_locus);
gimple_set_block (x, DECL_INITIAL (current_function_decl));
gsi_insert_after (&i, x, GSI_CONTINUE_LINKING);
may_fallthru = false;
}
/* If we lowered any return statements, emit the representative
at the end of the function. */
while (!data.return_statements.is_empty ())
{
return_statements_t t = data.return_statements.pop ();
x = gimple_build_label (t.label);
gsi_insert_after (&i, x, GSI_CONTINUE_LINKING);
gsi_insert_after (&i, t.stmt, GSI_CONTINUE_LINKING);
if (may_fallthru)
{
/* Remove the line number from the representative return statement.
It now fills in for the fallthru too. Failure to remove this
will result in incorrect results for coverage analysis. */
gimple_set_location (t.stmt, UNKNOWN_LOCATION);
may_fallthru = false;
}
}
/* Once the old body has been lowered, replace it with the new
lowered sequence. */
gimple_set_body (current_function_decl, lowered_body);
gcc_assert (data.block == DECL_INITIAL (current_function_decl));
BLOCK_SUBBLOCKS (data.block)
= blocks_nreverse (BLOCK_SUBBLOCKS (data.block));
clear_block_marks (data.block);
data.return_statements.release ();
return 0;
}